The fish families Sphyraenidae, Mugilidae,
and Atherinidae have been assigned to the percesocine
fishes by all authors, and many would
include only these (e.g., Berg, 1940: 368).
Others have expanded the group in various ways
(e.g., Boulenger, 1904: 636). Most commonly,
however, such expansion has extended only to
the family Polynemidae (e.g., Regan, 1912:
846) or, in recent years, to the polynemid and
phallostethoid fishes (e.g., Myers, 1935: 6).